A gillette



Aug. 14, 1956 w. A. GILLETTE ROTARY PUMP 3 Sheets-Sheet 2 Filed Aug. 20,1953 Aug. 14, 1956 w. A. GILLETTE 2,758,546

ROTARY PUMP Filed Aug. 20, 1953 5 Sheets-Sheet 5 ROTARY PUMP Wintord A.Gillette, Lorraine, N. Y. Application August 20, 1953, Serial No.375,407 '1 Claim. (01. 103-4) This invention relates generally to theclass of pumps and is directed more particularly to improvements inpumps of a rotary type.

A principal object of the present invention is to provide an improvedrotary type pump designed for pump' ing liquids or gases wherein thereis provided a novel type of impeller actuated by a rotating eccentricmember within a circular chamber whereby liquid or gas is drawn throughan inlet port and moved around in the chamber to and discharged from anoutlet port.

A further and more specific object of the invention is to provide a pumpof the character above stated wherein the impeller is in the form of anannulus positioned eccentrically within a circular chamber andoperatively coupled to an actuating rotating eccentric whereby theimpeller is caused to roll around within the circular chamber to effectthe desired movement of the liquid or gas from an inlet port to anoutlet port or discharge port.

Still another object of the invention is to provide in a pump of thecharacter stated, an annular impeller member which encircles and isrotatably supported on a rotating eccentric whereby upon the turning ofthe eccentric the impeller is caused to roll around within a pumpingchamber, the eccentric and impeller being ro tatable one with respect tothe other with a lubricated bearing band interposed between the two.

Still another object of the invention is to provide a rotary pumpstructure of the character stated employing a spring actuatedreciprocating valve plate having edge contact with periphery of, thecircular impeller and wherein friction and wear between the parts isreduced to a minimum by reason of the fact that the impeller operateswith a rolling action in a circular pumping chamber.

Other objects and advantages of the invention will become apparent asthe description of the same proceeds and the invention will be bestunderstood from a consideration of the following detailed descriptiontaken in connection with the accompanying drawing forming a part of thespecification, with the understanding, however, that the invention isnot to be limited to the exact details of construction shown anddescribed since obvious modifications will occur to a person skilled inthe art.

In the drawings:

Figure 1 is a view in elevation of the machine or pump looking towardthe front thereof, that is the part of the pump housing to which isattached the liquid or fluid inlet and exhaust box. v

Figure 2 is a horizontal section taken substantially on the line 2--2 ofFigure 1. v v

Figure 3 is a vertical section taken substantially on the line 33 ofFigure 2.

Figure 4 is a verticaltransverse section taken substantially on the line4-4 of Figure 3. I g

Figure 5 is a view in perspective of the sliding valve block.

"nited States Patent 0 Referring now more particularly to the drawing itwill be seen that the pump structure here illustrated is de signed tohouse two impellers although it is to be understood that any number ofimpellers may be employed in a housing of suitable size.

In accordance with the present invention there is provided for a twoimpeller pump structure a suitable supporting base 10 on which aremounted thevtwo vertical or upstanding supporting standards 12 each ofwhich is provided at its top end with a circular opening 14 for thepurpose about to be described.

Positioned between the standards 12, for support thereon in the mannerhereinafter set forth, is the pump housing which is generally designated16.

The pump housing 16 comprises the two spaced side walls or side plates18 each of which is of circular form and each of which has a flat radialextension 18a.

Each of the side walls is bordered by the inwardly extending circularperipheral wall 20 which is in the nature of a flange as shown in Figure2 and each of these peripheral walls or flanges extends along theradially directed side of the wall extension as indicated at 20a inFigure 3.

In addition to the extension flanges 20a, each side wall extension 18ahas formed upon and extending longitudinally of its inner face, that is,radially with respect to the circular wall 18, the spaced parallel innerflanges 22.

interposed between the two side walls 18 and between the opposing edgesof the peripheral walls or flanges 20 and 20a is the central partitionwall or plate which is likewise of disk form and has a radialsubstantially rectangular extension portion 24a, Figure 2, which is ofthe same height and same radial length or extent as the wall extensions18a and which lies between the opposing flanges 20a of the side wallsand the opposing edges of the inner flanges 22 of the two side wallextensions.

The side walls and partition wall are secured together in concentricrelation in a suitable manner as, for example,

by the employment of the long screw bolts 25 applied as,

illustrated in Figure 2.

With the wall construction thus described there are provided, twocircular concentric, impeller chambers each of which is designated 26.

Each of the, side Walls is formed to provide the central laterally oroutwardly extending hub 27 which has the terminal reduced portion 27awhich is positioned in an opening 14 of a standard 12 as illustrated inFigure 2, where it may be secured in a suitable manner as, for example,by the employment of a set screw 28.

Each of the hubs 27 has fitted into the passage 27b, a suitable bearingsleeve 29.

The partition wall or plate 24 also has a central opening which isdesignated 30 and which is in alignment with the passages 27b of theside wall hubs and fitted in leads to an axial grease distributionpassage or bore 56' running through the shaft and communicating withradial outlets 37 and 38 as illustrated for the lubrication of thebearings 29 and 30 and other parts hereinafter described.

One end of the shaft extends a substantial distance out- Y wardly beyondthe packing nut, here shown as the nut 53,

and has mounted thereon and secured thereto a wheel or pulley 37 withwhich suitable drive may be established with a power source through themedium of a belt 38 or in any other suitable manner.

Within each impeller chamber 26 there is mounted on the shaft 31 aneccentric 39 which is of circular outline and each eccentric is securedto the shaft by a key 40.

As shown in Figure 2 the eccentrics are positioned with the high pointsoppositely directed and each eccentric has formed radially therethrougha grease passage 41 which communicates with the adjacent lateral passage33 of the bore 36.

Encircling each eccentric 39 is a bearing band 42 and mounted upon eacheccentric and encircling the bearing band 42 is the circular impeller43.

The opening of each impeller is in the center thereof so that theimpeller'is in the form of a flat annulus in the central opening 43a ofwhich the bearing band 42 is positioned.

The radius of each impeller is such that at all times a peripheralsurface of the impeller will'be closely positioned against the circularinner wall 26a of the impeller chamber.

In order to maintain a leak proof association between the side faces ofeach impeller and the adjacent side walls of the impeller chamber, eachimpeller is provided in each side face with the circular packing channel44 and in each of these channels is the annular packing ring 4-5 whichmay be of any suitable material but is preferably bronze and theimpeller body is provided with the transverse bores 46 between theconcentric bearing channels 44, in which are positioned expansionsprings 47 which bear against the bronze rings and force the latteroutwardly against the inner faces of the chamber walls.

The arrangement of the opposing flanges a provides with the interposedextension of the partition wall or plate 24, the radial passages orports 48, the inner ends of which open into the impeller chambers whilethe outer ends open into chambers ofa manifold box as hereinafterdescribed.

As is also apparent upon reference to Figure 3, the spaced inner flanges22 provide between them a narrow chamber 49 in which is positioned asliding valve block 50, the radialinwardly extending edge 51 of which isrounded and directed into the adjacent impeller chamber for contact withthe peripheral surface of the adjacent impeller 43. As shown in Figure 2the valve block is of the same widthas the impeller 43 against which itbears.

Secured against the outer ends of the side wall extensions 18a and theflanges 20:: thereof to cover the open outer ends of ports 48 and thevalve block chambers 49, is a manifold box which is generally designated52. This box is secured in place by the screw bolts 53 as illustrated.

The manifold box has formed therein the two transverse fluid chambers 54and between them a valve block lubricant chamber 55.

Each of the fluid chambers 54 communicates with two ports 48 lying atone side of a valve block 50 while the intermediate lubricant chamber 55communicates with a valve block chamber 49. At each side of thelubricant chamber 55 the manifold block has formed therein from theouter side thereof the passage 56 which is in line with the back edge ofa valve block 50 and houses a valve block actuating spring 57.

The outer, end of each spring passage 56 is closed by the adjustment nutor screw 58 whereby the tension of the spring 57 can be adjusted asdesired.

The manifold block also has formed through the outer wall thereof twothreaded openings or passages 59, each of which leads into a fluidchamber 54 and each of which is designed to have secured therein an endof a fluid conducting pipe 60 as shown in Figures 2 and 3.

The ports or passages 48 and the chambers 54 have not been distinguishedone from the other as inlet or of the housing, this contact exhaustports as it will be readily apparent that either of the passages 48 maybe an inlet passage or an inlet port or either may be an outlet orexhaust port depending upon the direction of rotation of the impellers43. Con sequently the ports or passages 48, the chambers 54 and pipes 60may function as inlets or outlets as will be readily apparent.

From the foregoing it will be seen that in the operation of the presentpump, when the shaft 31 is rotated the ac centrics 39 in turning willimpart a rolling movement to the circular impellers mounted thereon, theimpellers rolling around against the circular inner surfaces 26:: of thechambers in which they are housed. With this action it will be seen thatthere is no rubbing contact between the periphery of the impeller andthe circular wall of the housing but merely a rolling action whichreduces wear to a minimum. Likewise the frictional contact between thespring actuated valve blocks 50 and the peripheries of the impellers issuch that a minimum of wear occurs.

While the circular impellers are moved with a rolling motion as statedit will also be seen that they are free to turn with respect to theeccentrics 39 so that there may be some turning of the eccentric withinthe impeller in association with the rolling action of the impeller.

Since the impeller is a separate and free part which is centered betweenthe housing side wall and center plate by action of the springs 47against the bronze packing rings 45 the necessary fluid tightconnections are made with the side walls of the impeller chamber at alltimes without being affected by expansion or contraction of the parts..The face or peripheral surface of the impeller is the only part whichmakes close contact with the wall being with the circular inner surface26a. This contact with the face of the impeller causes the impeller toroll as previously stated to thereby move the fluid instead of pushingthe fluid as would be the case if the impeller were an eccentric bodyturning with the driving shaft.

As previously pointed out the valve blocks are in chambers which are incommunication with the lubricant chamber 55 of the manifold block and asthis lubricant chamher is filled or partly filledwith suitablelubricant, the valve blocks will be fully lubricated at all timesand thesprings will be assisted in maintaining an equal and constant contact ofthe valve blocks with the peripheral faces of the impellers.

It will also be readily apparent from the foregoing that a pumpconstructed in accordance with the present invention has moving partsreduced to a minimum and is of such design that either impeller orimpeller eccentric, or other parts can be removed and replaced with aminimum of effort and it will also be seen that the pump structure canbe readily placed at any desired angle without impairing its efficiency.

I claim:

A pump of the character stated, comprising a body having a circularchamber, a partition centered between the side walls of said chamber todivide the same into two equal parts, a shaft extending through theradial center of the chamber and supported for rotation in said sidewalls and said partition, a circular member mounted eccentrically on theshaft in each chamber part, means securing each member to the shaft, anannular impeller concentric with and encircling each member for freeturning movement therearound and having peripheral contact with thecircular wall of the chamber, adjacent parallel inlet and outlet portsopening into the chamber through said circular wall to either side ofthe adjacent edge portion of said partition so that said ports arecommon to both chamber parts, a spring urged valve block directedradially into each of the chamber parts and bearing against theperiphery of each impeller, and a lubricant chamber opening through saidcircular wall between said ports for discharging the lubricant into thechamber parts to either side of the adjacent edge portion of saidpartition the impeller and valve block being equal in Width to theinside width of the chamber.

References Cited in the file of this patent UNITED STATES PATENTS254,069 Taylor Feb. 21, 1882 1,379,785 Shockley May 31, 1921

